红壤稻田长期施钾肥及有机肥对水稻叶面积指数及产量构成的影响

在实施了29年定位施肥试验的红壤稻田,进行了水稻叶面积的测量分析和水稻产量构成分析。结果表明:抽穗期叶面积指数增施钾肥提高13.0%,增施有机肥提高47.0%。钾效应系数为13.0%,有机肥效应系数为14.3%。产量构成方面,增施钾肥有效穗数提高5.1%,每穗总粒数提高15.3%,结实率提高0.8%,千粒重提高5.5%;增施有机肥有效穗数降低1.3%,每穗总粒数增加11.8%,结实率降低2.0%,千粒重降低13.0%。

Effects of Long-term Application of Potassium and Organic Fertilizer on Leaf Area Index and Yield Components of Rice in Red Soil Paddy Field

The long-term located fertilization experiments have been implemented in red soil paddy field for 29 years.Measurement and analysis of leaf area index(LAI) and yield components of rice in this experimental field were conducted.The results showed that the additive application of potassium and organic fertilizer could increase the LAI of rice in heading period by 13.0% and 47.0% respectively.The effect coefficient of potassium and organic fertilizer was 13.0% and 14.3% separately.After the application of potassium,the number of productive ears,total grains per ear,setting rate and kilo-grain weight were increased by 5.1%,15.3%,0.8% and 5.5% respectively.Application of organic fertilizer could decrease the number of productive ears by 1.3%,total grains per ear by-11.8%,setting rate by 2.0%,and kilo-grain weight by 13.0%.